Home / 18,338.21-25,302.83-10,781.78

Finding the Fourth Proportional to 18,338.21, 25,302.83 and 10,781.78

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Solution

The fourth proportional to 18,338.21, 25,302.83 and 10,781.78 is: 14,876.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,338.21 : 25,302.83 = 10,781.78 : x
  2. Step 2: Convert to fraction form
    18,338.21/25,302.83 = 10,781.78/x
  3. Step 3: Cross multiply
    18,338.21x = 25,302.83 × 10,781.78
  4. Step 4: Simplify right side
    18,338.21x = 272,809,546.44
  5. Step 5: Solve for x
    x = 272,809,546.44/18,338.21
  6. Step 6: Final answer
    x = 14,876.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.